Rayoso Formation

Rayoso Formation
Stratigraphic range: Aptian
Type Geological formation
Unit of Huitrín-Rayoso Group
Sub-units Pichi Neuquén Member
Underlies Lohan Cura & Carrín Cura Formations
Overlies La Amarga & Huitrín Formations
Thickness up to 604 m (1,982 ft)
Lithology
Primary Sandstone
Location
Coordinates 38°24′S 69°54′W / 38.4°S 69.9°W / -38.4; -69.9Coordinates: 38°24′S 69°54′W / 38.4°S 69.9°W / -38.4; -69.9
Approximate paleocoordinates 40°06′S 37°30′W / 40.1°S 37.5°W / -40.1; -37.5
Region Neuquén Province
Country  Argentina
Extent Neuquén Basin

The Rayoso Formation is a geological formation in the Neuquén Province of Argentina whose strata date back to the Aptian stage of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1] The formation has a maximum thickness of 604 metres (1,982 ft) and has one member, the Pichi Neuquén Member. The unit comprises sandstones deposited in a lacustrine environment.[2]

Vertebrate paleofauna

Indeterminate Ceratosauria remains located in Neuquén Province, Argentina.[1]

Dinosaurs of the Rayoso Formation
Genus Species Presence Notes Images

Rayososaurus[1]

R. agrioensis[1]

Geographically located in Provincia de Neuquén, Argentina.[1]

"Left scapula, distal end of right scapula, partial left femur, proximal part of left fibula, partial skull and skeleton, plus at least [three] other individuals."[3]

See also

References

  1. 1 2 3 4 5 Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 570-71. ISBN 0-520-24209-2.
  2. ↑ 3 km south of Agrio del Medio at Fossilworks.org
  3. ↑ "Table 13.1," in Weishampel, et al. (2004). Page 264.

Further reading

  • J. F. Bonaparte. 1996. Cretaceous tetrapods of Argentina. Münchner Geowissenschaften Abhandlungen 30:73-130
  • L. Salgado, J. I. Canudo, A. C. Garrido and J. L. Carballido. 2012. Evidence of gregariousness in rebbachisaurids (Dinosauria, Sauropoda, Diplodocoidea) from the Early Cretaceous of Neuquén (Rayoso Formation), Patagonia, Argentina. Journal of Vertebrate Paleontology 32(3):603-613
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